Apparatus for treatment of bone-black



(No Model.) 2. Sheets-Sheet 1]. I

E. A. SCRIBNER.

APPARATUS FOR TREATMENT OF BONE BLACK. 7. No. 538,028. Patented Apr. 23,1895.

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(No Model.) 2' Sheets- Sheet 2.

E. A. SO-RI-BNER. APPARATUS FOR TREATMENT OF BONE BLACK.

No; 538,028. Patented Apr. 23,1895.

r'rED STATES PATENT Ormc,

EDWIN ArsORlBNER, OF ELIZABETH, NEYV JERSEY.

APPARATUS FOR TREATMENT OF BONE-BLACK.

SPECIFICATION forming part of Letters Patent No. 538,028, dated April23, 1895,;

Application filed July 16, 1892- Serial No. 440,210. (No model.)

. To aZZ whom it may concern.-

Be it known that I, EDWIN A. SORIBNER, of Elizabeth, in the county ofUnion and State of New Jersey, have invented a new and useful.

Improvement in Apparatus for the Treatment of Bone-Black, of which thefollowing is a specificationj The special object of my invention is toremove the oil from the spent bone-black of oil refineries, so astoprepare it for use in the manufacture of fertilizers, and at the sametime to use the heat generated by the combustion of the oil for makingsteam, distilling oil, evaporating or other purposes. r

Heretofore the spent bone-black saturated with oil has been sold to bemixed with acid in the manufacture of superphosphates. The presence ofthe oil lowers the grade, and also retards the chemical action betweenthe acid and the bone-black. The high fire test of the oil in spentbone-black has heretofore rendered itdifficult to burn it.

My invention consists in means for causing the saturated bone-black tofall in a finely divided state through a vertical combustion chamber,the oil being consumed during the descent of the material; 'and inconducting the products of the combustion away through suitable fines,as hereinafter more fully set forth.

A practical embodiment of my invention is represented in theaccompanying drawings, in which-- Figure 1 represents in verticalsection, the upright combustion chamber and a connected system of fines,together with a system of steam boilers for utilizing the heat; and Fig.2 represents the structure in horizontal section.

' A is the vertical combustion chamber, preferably formed inside avertical chimney about twenty-five feet in height.

Bis a horizontal flue connected with the combustion chamber by thevertically extend.

ing-flue C, and leading to the auxiliary stack or uptake D. The fine Bis provided with bridges 1), 17,17, forming dust pockets to collect thedust carried over by the draft; and also with openings E,E leading intoflues that connect with the combustion chambers of two steam boilers,these openings being provided with dnmpers F, F, to control the amountof heat allowed to pass to each.

The combustion chamber in the vertical chimney is provided, near itsupper end, with inclined plates G, G. Just under the plate G is the feedaperture, through which the comminuted bone-black is introduced from thehopper H by means of a feed screw I or other suitable mechanism.

The manner of operating, so as to attain the best results as to grade ofbone phosphate and economy of the products ofcombustion for heatingpurposes is as follows: I elevate the oil-saturated bone-black or othermaterial by a bucket elevator, run by the shaft and pulley J, into thehopper H, and the screw I feeds the material into the combustion chamber in quantities regulated by the speed of the screw. To carry thematerial into the middle of the chamber, it may be caused to strike uponan inclined tile K, from'which it rolls off and falls through thechamber, the oil being thoroughly burned out during the descent, fromeach successive portion of the material meeting a constant flamegenerated by the burning of preceding particles. The purified bone-blackfinds an exit through the opening L, where it may be taken by elevatorbuckets and removed to any desired place to cool. The initial flame maybe produced by burning some light oils or kindling a wood fire at theopeningL, and adding alittle oil black; or the first portion of thematerial discharged into the combustion chamber may be mixed withnaphtha, and ignited as it enters the chamber. The continuedintroduction of fresh material and consequent constant fiame produces anintense heat which is carried by the draft which enters at the opening Lover the bridge wall M, down the flue O and along the fiue B.

The inclined plates G, G are to reflect the dust as much as possible andprevent it going over into the fines. The finer particles carried overare collected in the chambers of flue B and are removed at times throughsuitable doors. For some heat using appliances it may be desirable tovary the form of dust chambers. I

The openings E, E connect the flue B, 10-

cated below the level of the ash pits of the boilers, with the fines N,N leading to the combustion chamber of the boilers. The dampers F, F, oftile or other fire proof material, can be raised or lowered at will toopen or close the openings, makingit possible to conduct the hot currentto either boiler or to both, or to shut it off altogether. After passingover or about the heating surfaces it passes to the fine that leads tothe stack of the boilers. \Vhen all the openings E, E are closed, theproducts of combustion will pass 01f through the auxiliary stack D; butthe base of this stack may be entirely closed by the damper R in whichcase of course the dampers F, F, or some of them, must be open.

The bridges 0,0 are to keep the coal on the grate bars P, from fallinginto the fines. As the heat is very great, it is not possible to bringit in contact with the grate bars of the furnaces without rapidlyburning them out. This is. a reason for introducing the products ofcombustion into the combustion chambers above the grate bars. I preferto have grate bars, as shown in Fig. 2, in order that coal may be usedwhenever the. operation of burning the oil is discontinued becauseoflack of'supply or for other reasons.

The walls of the combustion chamber A should be lined with fire-brickthroughout and be of suflicient thicknessto retain theheat.

It is possible to heat iron red hot at a distance of fifty feet or. morefromthe combustion chamber, by the heat produced by the combustion ofthe oil in waste. bonerblack by my apparatus.

What I claim.is-

l. Theherein described apparatus for the treatment of bone black,comprising a vertical chimney for the reception of the bone black to betreated, means for feeding the bone black continuously into the upperportion of the chimney, an inclined tile for receiving the bone black.as it is fed into the chimney fine for spreading it and distributing itin a conveniently divided state to promote combustion, inclined plateslocated Within the fine above the feed aperture for arresting the upwardmovement of the substance under treatment, the chimney being furtherprovided with a second vertically extending flue through which theproducts of combustion are forced to pass and means for conducting theproducts of combustion from the second vertically extending flue to anuptake, substantially asset forth.

2. The herein described apparatus for the treatment of bone black,comprising a vertical chimney for the reception of the bone black to betreated, means for feeding the bone black continuously into the upperportion of the chimney, means for-spreading the masslafter it has beeninserted into the chimney flue for facilitating the combustion, in-

clined plates-Within the flue for arresting the upward movement of thebone black, the chimney being further providedwith a secondverticallyextending. fine, and an uptake connected with the second verticallyextending flue by meansof a horizontally extending fine, substantially.as set forth.

EDWIN A. SCRIBNER. \Vitnesses:

FREDK. HAYNES, GEORGE BARRY;

